Amoraine is a cone-shaped deposit of calcite that builds up on the floor of a cave.

The given statement is false.

Explanation:

Stalagmite refers to the cone-shaped deposit of calcite, which accumulates on the floor of a cave. This is not the same as stalactite, which is also a cone-configured deposit, however, it gets accumulated on the ceiling of the cave. While moraine refers to a formation of ridge taking place due to deposition of the fill at the border of a glacier.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added